{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-72338 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-72338 is a high-severity vulnerability in Linux, published on 15 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-72338 and fix it if it is affected.\n\nWhat it is: CVE-2026-72338 is a high-severity vulnerability in Linux, published on 15 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-72338 in the wild and no public exploit code.\n\nAffected product: Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-72338/ (Markdown: https://insights.sbomify.com/CVE-2026-72338/index.md)","id":"CVE-2026-72338","markdown":"https://insights.sbomify.com/CVE-2026-72338/index.md","name":"CVE-2026-72338","record":{"aliases":["BELL-CVE-2026-72338","DEBIAN-CVE-2026-72338","GHSA-hgh2-wfvr-f9mp","UBUNTU-CVE-2026-72338"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A race condition in the Linux kernel's traffic control allows local attackers with CAP_NET_ADMIN to trigger a heap out-of-bounds write, potentially leading to code execution or privilege escalation.","user_interaction":"not_required","vuln_class":"race_condition"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_pedit: fix TOCTOU heap OOB write in tc offload\n\nThere is a TOCTOU race condition in flower lockless approach between sizing\na flow_rule buffer and filling it.\nzdi-disclosures@trendmicro.com reports:\nThe cls_flower classifier operates with TCF_PROTO_OPS_DOIT_UNLOCKED\n(fl_change runs without RTNL), while RTM_NEWACTION holds RTNL, so the\nindependent locking domains make the race reachable in practice.  KASAN\nconfirms:\n  BUG: KASAN: slab-out-of-bounds in tcf_pedit_offload_act_setup+0x81b/0x930\n  Write of size 4 at addr ffff888001f27520 by task poc-toctou/312\n  The buggy address is located 0 bytes to the right of\n   allocated 288-byte region [ffff888001f27400, ffff888001f27520)\n   (cache kmalloc-512)\n\nNote: The result is a heap OOB write attacker-controlled content into the\nadjacent slab object (requires CAP_NET_ADMIN).\n\nThe fix introduces reading tcfp_nkeys under act-\u003etcfa_lock in all places\nusing a new tcf_pedit_nkeys_locked() which replaces the old tcf_pedit_nkeys().\nAdditionally we close the remaining TOCTOU window between the sizing read and\nthe fill reads by more careful accounting.\nRather than silently truncating the key count, which leads to incorrect\naction semantics offloaded to hardware and secondary OOB writes if\nthe remaining capacity is zero or consumed by prior actions, we enforce\nremaining capacity checks and return -ENOSPC if the required space exceeds\nthe remaining capacity.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"net/sched: act_pedit: fix TOCTOU heap OOB write in tc offload","id":"CVE-2026-72338","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"race_condition","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"qede: fix off-by-one in BD ring consumption on build_skb failure","id":"CVE-2026-72339"},"packages":[],"prev":{"headline":"Bluetooth: 6lowpan: avoid untracked enable work","id":"CVE-2026-72337"},"products":["Linux"],"published":"2026-08-15","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-16","vendors":["Linux"]},"summary":"A race condition in the Linux kernel's traffic control allows local attackers with CAP_NET_ADMIN to trigger a heap out-of-bounds write, potentially leading to code execution or privilege escalation.","url":"https://insights.sbomify.com/CVE-2026-72338/"}